Stanley FMMT13072-0 open end wrench

The Stanley FMMT13072-0 open end wrench is a double open-ended hand tool with 21x23 mm jaw sizes and a 300 mm overall length. Forged from chromium-vanadium steel and finished in satin chrome, the wrench is designed for strength, corrosion resistance and durability. Each end is offset by 15 degrees to increase access in confined spaces and provide clearance for knuckles and nearby obstacles. The single-piece design and included pocket holder make it convenient to carry on job sites.

Advantages

The chromium-vanadium steel construction offers high tensile strength and wear resistance while the satin chrome finish reduces corrosion and simplifies cleaning. The anti-slip profile improves grip on fasteners to reduce rounding, and the 15-degree offset at each end increases working angles for better accessibility in tight areas. At 300 mm long, the wrench provides leverage for loosening and tightening larger nuts and bolts without excessive force.

Suitable for

• Automotive repair and maintenance — working on suspension, chassis and engine fasteners
• Industrial maintenance — assembly and disassembly of machinery with 21 mm or 23 mm fasteners
• Construction and metalwork — fastening tasks where increased access angle is required
• Home workshop use — plumbing and DIY projects involving medium to large nuts

Key specifications

• Material: Chromium-vanadium steel
• Finish: Satin chrome
• Jaw sizes: 21 mm and 23 mm (double open end)
• Offset angle: 15 degrees per end
• Length: 300 mm
• Weight: 246 g
• Quantity per pack: 1 piece

How to use

Select the appropriate end (21 mm or 23 mm) to match the fastener size, place the wrench over the nut or bolt head ensuring full seating of the jaw on the flat surfaces, and apply steady force in the required direction. Use the 15-degree offset to improve access when working near obstructions or when more clearance for your hand is needed. Inspect the wrench before use for any damage, and avoid using cheater bars or extensions that could overload the tool beyond its design limits.

Usage recommendations

Store the wrench in a dry place and wipe clean after use to maintain the satin chrome finish. For safe operation, pair the tool with appropriate personal protective equipment such as gloves and eye protection when working on live machinery or in constrained positions.